Bootup linux kernel profiling tool including kexec?

Question

Apart from OProfile, what tools do you recommend that I can use to profile my linux kernel while booting up?

I use kexec in Ubuntu server 9.04. OProfile doesn't seem to do the desired work for me, or at least I don't seem to be able to run it.

Any recomendation about a tool would be helpful, and if you know of a tool that can be used with kexec then that would be even better.

Many thanks

Appleman1234 · Accepted Answer · 2012-03-18T03:10:13.413

2

Other tools that can be used to profile the kernel include:

Also see here for general information regarding profiling in Linux.

The boot process can be profiled using:

Bootchart an example of this is available here This does everything after the kernel.
Printk Times, this can be used to profile kernel bootup.
Kernel Function Trace, this can be used to profile kernel bootup, though it has an approximate 30% overhead.
Boot Probe, set of System Tap scripts for boot time profiling
Also see Kernel Instrumentation

edited Mar 18 '12 at 03:10

answered Mar 18 '12 at 01:48

Appleman1234

I will look into them. I believe perf wouldn't work on my Ubuntu but I am not 100% sure. Apart from that, can any of these be used to profile the booting processes as well ? sorry I missed the booting issue in my original post. – Louis Mar 18 '12 at 02:33
Best to additional information to your existing question, rather than as comment. – Appleman1234 Mar 18 '12 at 02:37
Thank you :) I edited my post... Bootchart wouldn't profile the kernel files... It starts after init – Louis Mar 18 '12 at 02:56

1 Answers1